I have created a wish for graphisoft to decouple saving pallets and menus for exactly this reason. You can express your support for it here https://community.graphisoft.com/t5/Wishes-forum/User-interface-management/m-p/223055#M13927
(Thank you, if you do!)
There is also a good workaround suggestion from Laszlo Nagy that might save you from having to redo all your palets manually, so its worth visiting either way.
From Archicad 8.5 all the way to the present.
Passionate Autocad hater as well.
Wish to save palets and menus individualy in work enviroments: